Workers carry a portrait of Nelson Mandela as thousands of people celebrate his 95th birthday outside the Mediclinic Heart Hospital on July 18 in Pretoria, South Africa. Mandela has been in the hospital since June 8 for treatment for a recurring lung infection. Christopher Furlong, Getty Images

Bicyclists competing in the Tour de France wait behind a large picture of Mandela before beginning Stage 18 from Gap to l'Alpe d'Huez in Gap, France. Doug Pensinger, Getty Images

Schoolchildren sing 'Happy Birthday' to former Mandela at Phefeni High School in Soweto Township. Christopher Furlong, Getty Images

A visitor snaps a photograph of a Mandela poster at an international exhibition of 95 posters from around the world celebrating Mandela's 95th birthday on July 17 at the University of Pretoria. Ben Curtis, AP